Gallery:

SEPTA bus service remained suspended on most suburban routes because of icy, snow-narrowed roads. In the city, a limited number of routes were operating.

On Regional Rail trains, service is up to 90 minutes late on lines that were running. The R-6/Cynwyd, R-7/Chestnut Hill East, and R-8/Fox Chase lines are not operating at all. The R-1/Airport is running hourly service, the R-2/Wilmington line was operating only between Marcus Hook and Center City, and the R-3/West Trenton line was operating only between Neshaminy Falls and Center City.

A lack of train crews, because of minimum-rest requirements and difficulty getting to work, slowed the return to normal service, said SEPTA spokesman Andrew Busch.

Ridership remained light today, at about 25 percent of a normal weekday, Busch said.

The Market-Frankford and Broad Street subway lines are operating, and many passengers unable to find a bus or train were getting on the subways.

In New Jersey, PATCO trains between Center City and South Jersey were operating on a 15-minute schedule, and NJ Transit buses were running, with delays.

Service on the Cape May-Lewes Ferry has been suspended for a second day because of the weather.